X = [[12, 7], [4, 5], [3, 8]]

result = [[0, 0, 0], [0, 0, 0]]

# iterate through rows
for i in range(len(X)):
    # iterate through columns
    for j in range(len(X[0])):
        result[j][i] = X[i][j]

for r in result:
    print(r)
